'n shit is a better way of finishing a sentence that you'd rather not drag out and continue. it is inserted at the end of a sentence or phrase. some people say 'and stuff' but saying 'n shit is clearly better. when having a conversation with someone you must insert the word 'n shit as many times as you can. infact, its almost a game too.
i'm so tired 'n shit, i didn't get any sleep last night 'n shit cos i was thinking about loadsa crazy shit 'n shit.